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Finding the Fourth Proportional to 3,828.69, 5,742.81 and 1,878.93

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Solution

The fourth proportional to 3,828.69, 5,742.81 and 1,878.93 is: 2,818.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,828.69 : 5,742.81 = 1,878.93 : x
  2. Step 2: Convert to fraction form
    3,828.69/5,742.81 = 1,878.93/x
  3. Step 3: Cross multiply
    3,828.69x = 5,742.81 × 1,878.93
  4. Step 4: Simplify right side
    3,828.69x = 10,790,337.99
  5. Step 5: Solve for x
    x = 10,790,337.99/3,828.69
  6. Step 6: Final answer
    x = 2,818.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.